A gas safety collection device for installation on a drone

Abstract

The invention discloses a gas safety collection device for installation on a drone, including a top plate, four supporting legs, a gas sampling mechanism, a suspension retractable mechanism and a fuselage binding mechanism; the gas sampling mechanism is suspended on the suspension retractable mechanism by a suspension rope; the suspension retractable mechanism is arranged at the center of the lower side of the top plate, and is used to release and recover the gas sampling mechanism; the fuselage binding mechanism is arranged on the upper side of the top plate, and is used to install the top plate on the fuselage of the drone. The gas safety collection device utilizes the suspension retractable mechanism to realize the release and recovery control of the gas sampling mechanism, thereby cooperating with the gas sampling mechanism to realize remote gas collection, without the need for personnel to enter the barn for detection, effectively ensuring personnel safety; the fuselage binding mechanism can meet the adaptability of the collection device to various types of drones, and has good universality.

Description

Technical Field

[0001] The invention relates to a gas safety collection device, in particular to a gas safety collection device for installation on a drone. Background Art

[0002] At present, the existing granary gas collection is all done manually on-site. However, in the closed environment of the granary, there are often gases that are harmful to human health, and people are prone to poisoning when entering for inspection. Therefore, it is necessary to design a gas safety collection device for installation on a drone, so that it can be installed on a drone to realize remote unmanned gas safety collection and avoid danger to personnel. Invention content

[0003] Purpose of the invention: To provide a gas safety collection device for installation on a drone, so that the device can be installed on a drone to realize remote unmanned gas safety collection and avoid danger to personnel.

[0004] Technical solution: The present invention creates a gas safety collection device for installation on a drone, comprising a top plate, four supporting legs, a gas sampling mechanism, a suspension and retracting mechanism, and a fuselage binding mechanism;

[0005] Four supporting legs are vertically installed at four top corners of the lower side of the top plate, and rubber feet are sleeved on the lower ends of the four supporting legs; the four supporting legs are fixedly installed on the same fixed circular ring; the gas sampling mechanism is suspended on the suspension retracting mechanism through a suspension rope, and the gas sampling mechanism is provided with a detection plug for inserting into grains; the lower end of the detection plug is closed by a conical tip; a detection air inlet hole is provided on the lower end of the detection plug; the suspension retracting mechanism is arranged at the center of the lower side of the top plate, and is used for releasing and recovering the gas sampling mechanism; the fuselage binding mechanism is arranged on the upper side of the top plate, and is used for installing the top plate on the fuselage of the UAV.

[0006] Further, the gas sampling mechanism includes a rectangular frame, a cylindrical collecting box and a disc-shaped piston;

[0007] A lifting ear is provided at the center of the upper side surface of the top frame of the rectangular frame; the lower end of the suspension rope is fixed on the lifting ear; a side seat is provided in the middle of the outer side surface of the left and right side frames of the rectangular frame; a rectangular sliding hole is vertically provided on the side seat; the left and right side frames of the rectangular frame are respectively slidably inserted into the rectangular sliding holes of the two side seats; a cylindrical cavity is vertically provided inside the cylindrical collecting box, and a disc-shaped piston is horizontally installed in the cylindrical cavity; a sealing ring is provided on the circumferential edge of the disc-shaped piston, and the sealing ring is tightly attached to the vertical cavity wall of the cylindrical cavity; the detection tube is vertically penetrated and fixedly installed on the lower side frame of the rectangular frame; the upper end of the detection tube is inserted into the cylindrical cavity from the bottom center of the cylindrical collecting box, and at the insertion position of the detection tube A sealing seat is provided; the upper end of the detection insert is fixedly installed at the center of the lower side surface of the disc-shaped piston, and an air inlet hole is provided on the upper end tube wall; an air outlet pipe is also provided at the bottom of the cylindrical collecting box, and a pipe mouth cap is threadedly installed at the pipe mouth of the air outlet pipe; an exhaust hole is provided at the top of the cylindrical collecting box; an embedding hole is provided at the same height of the left and right side frames of the rectangular frame; a locking spring is provided in the embedding hole, and a ball is provided at the hole mouth of the embedding hole; the locking spring is used to elastically push the ball to partially protrude out of the embedding hole to limit the side seat; when the side seat is located above the ball, the disc-shaped piston is close to the bottom of the cylindrical cavity; when the side seat slides to below the ball, the cylindrical collecting box moves downward so that the disc-shaped piston is close to the top of the cylindrical cavity.

[0008] Furthermore, an oblique support rod is obliquely arranged between the detection cannula and the rectangular frame.

[0009] Furthermore, the suspension retracting and releasing mechanism includes a driving motor, a driving belt, an electromagnet, a winding roller, a driving circular shaft and a rebound compression spring;

[0010] A line roller support, a pulley support and a side plate are provided on the lower side of the top plate; the winding roller is rotatably mounted on the line roller support through the line roller shaft; a pulley shaft is rotatably mounted on the pulley support; a driving pulley is fixedly mounted on the pulley shaft; a square driving hole and a circular shaft hole are sequentially arranged on the line roller shaft along the central axis, and the side length of the square driving hole is greater than the aperture of the circular shaft hole; the driving circular shaft sequentially penetrates the square driving hole and the circular shaft hole on the line roller shaft, and can rotate freely in the circular shaft hole; a synchronous square shaft is extended at one end of the driving circular shaft, and a square shaft head is arranged at the other end of the driving circular shaft; a square synchronous hole is arranged on the pulley shaft along the central axis, and the synchronous square shaft is penetrated and It is installed on the square synchronous hole so that the synchronous square shaft rotates synchronously with the pulley shaft; a limit disc is provided on the side of the square shaft head, and the diameter of the limit disc is greater than the side length of the square driving hole; a short shaft is rotatably installed on the through end of the synchronous square shaft, and a magnetic suction disc is provided on the short shaft; the electromagnet is installed on the side plate, and an iron disc opposite to the magnetic suction disc is provided at the iron core end of the electromagnet; the rebound compression spring is sleeved on the driving circular shaft, and the two ends of the rebound compression spring are elastically supported on the limit disc and the wire roller support; the driving motor drives the driving pulley to rotate through the driving belt; the suspension rope is wound on the winding roller; when the iron disc and the magnetic suction disc are attracted, the driving circular shaft moves axially to make the square shaft head embedded in the square driving hole.

[0011] Furthermore, a protective plate is provided on the wire roller support and below the winding roller; a threading hole is provided on the protective plate; and a suspension rope passes through the threading hole.

[0012] Furthermore, a guide slope is provided at the connection between the square shaft head and the driving circular shaft to facilitate the square shaft head to be quickly embedded in the square driving hole; circular baffles are provided at both ends of the winding roller to prevent the suspension rope from being wound into the gap between the winding roller and the roller support.

[0013] Furthermore, an infrared position sensor for detecting the rising position of the gas sampling mechanism is provided on the supporting leg; an electrical connection socket is provided on the lower side of the top plate; the electrical connection wires of the infrared position sensor, the electrical connection wires of the drive motor and the electrical connection wires of the electromagnet are electrically connected to the electrical connection socket.

[0014] Further, the fuselage binding mechanism includes two side clamping plates, two bottom clamping plates, a top clamping plate, a steel wire rope and a locking bolt;

[0015] The lower sides of the two side clamping plates are hingedly mounted on the left and right side edges of the upper side of the top plate through two hinge seats; the two bottom clamping plates are hingedly mounted on the opposite inner sides of the two side clamping plates; a steel rope fixing seat is provided on the upper side of the top clamping plate, and a steel rope through hole is provided on the steel rope fixing seat; a steel rope locking hole is provided on the side of the right side clamping plate extending downward, and the lower hole of the steel rope locking hole passes through the right side of the side clamping plate; the locking screw The bolt thread is screwed into the right side surface of the side clamping plate on the right, and the end of the locking bolt extends into the steel rope locking hole, and a steel rope clamping plate is rotatably arranged on the extended end; one end of the steel wire rope is fixed to the bottom clamping plate on the right, and the other end is successively inserted into the rope threading hole in the bottom clamping plate on the left, the rope threading hole in the side clamping plate on the left, the steel rope through hole on the steel rope fixing seat and the steel rope locking hole and then extends out; the steel rope clamping plate is pressed on the steel wire rope to achieve fixation.

[0016] Furthermore, rubber anti-skid pads are provided on the opposite inner side surfaces of the two side clamping plates, on the upper side surfaces of the two bottom clamping plates, and on the lower side surface of the top clamping plate.

[0017] Furthermore, a triangular rib plate is provided at the mounting position of the supporting leg and the lower side of the top plate.

[0018] Compared with the prior art, the invention has the following beneficial effects: four supporting legs can be used to realize the mounting installation of the lower suspension retracting and releasing mechanism and the gas sampling mechanism, so that the detection tube will not touch the ground when the UAV lands; the gas sampling mechanism can be used to collect gas inside the grain pile after release; the suspension retracting and releasing mechanism can be used to realize the release and recovery control of the gas sampling mechanism, thereby cooperating with the gas sampling mechanism to realize remote collection of gas, without the need for personnel to enter the barn for detection, effectively ensuring the safety of personnel; the conical tip can facilitate the insertion of the detection tube into the grain pile, so as to collect the internal gas; the fixed ring can be used to limit the gas sampling mechanism after it is returned to its position, so as to prevent excessive shaking during flight; the fuselage binding mechanism can meet the adaptability of the collection device to various types of UAVs, and has good universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of the present invention;

[0020] Figure 2 The figure is a schematic diagram of the structure of the suspension retractable mechanism created by the present invention. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0022] Embodiment 1:

[0023] like Figure 1 and 2 As shown, the gas safety collection device for installation on a drone disclosed in the invention comprises: a top plate 1, four supporting legs 2, a gas sampling mechanism, a suspension and retracting mechanism, and a fuselage binding mechanism;

[0024] Four supporting legs 2 are vertically installed at the four top corners of the lower side of the top plate 1, and rubber feet 4 are sleeved on the lower ends of the four supporting legs 2; the four supporting legs 2 are fixedly installed on the same fixed ring 3; the gas sampling mechanism is suspended on the suspension and retracting mechanism through a suspension rope 9, and the gas sampling mechanism is provided with a detection plug 41 for inserting into the grain; the lower end of the detection plug 41 is closed by a conical tip 43; a detection air inlet hole 44 is provided on the lower end of the detection plug 41; the suspension and retracting mechanism is arranged at the center of the lower side of the top plate, for releasing and recovering the gas sampling mechanism; the fuselage binding mechanism is arranged on the upper side of the top plate 1, for installing the top plate 1 on the fuselage of the drone.

[0025] The four supporting legs 2 can be used to realize the mounting installation of the lower suspension and retracting mechanism and the gas sampling mechanism, so that the detection tube 41 will not touch the ground when the UAV lands; the gas sampling mechanism can be used to collect gas inside the grain pile after release; the suspension and retracting mechanism can be used to realize the release and recovery control of the gas sampling mechanism, so as to cooperate with the gas sampling mechanism to realize remote collection of gas, without the need for personnel to enter the barn for inspection, effectively ensuring the safety of personnel; the conical tip 43 can facilitate the insertion of the detection tube 41 into the grain pile, so as to collect the internal gas; the fixed ring 3 can be used to limit the gas sampling mechanism after it is returned to its position to prevent excessive shaking during flight; the fuselage binding mechanism can meet the adaptability of the collection device to various types of UAVs and has good universality.

[0026] Further, the gas sampling mechanism includes a rectangular frame 31, a cylindrical collection box 32, and a disc-shaped piston 35;

[0027] A lifting ear 34 is provided at the center of the upper side surface of the top frame of the rectangular frame 31; the lower end of the suspension rope 9 is fixed on the lifting ear 34; a side seat 37 is provided in the middle of the outer side surface of the left and right side frames of the rectangular frame 31; a rectangular sliding hole is vertically provided on the side seat 37; the left and right side frames of the rectangular frame 31 are respectively slidably inserted into the rectangular sliding holes of the two side seats 37; a cylindrical cavity is vertically provided inside the cylindrical collecting box 32, and a disc-shaped piston 35 is horizontally installed in the cylindrical cavity; a sealing ring 36 is provided on the circumferential edge of the disc-shaped piston 35, and the sealing ring 36 is tightly attached to the vertical cavity wall of the cylindrical cavity; the detection tube 41 is vertically through-fixedly installed on the lower side frame of the rectangular frame 31; the upper end of the detection tube 41 is inserted into the cylindrical cavity from the bottom center of the cylindrical collecting box 32, and a sealing ring 36 is provided at the insertion position of the detection tube 41 Sealing seat 45; the upper end of the detection insert 41 is fixedly mounted at the center of the lower side surface of the disc-shaped piston 35, and an air inlet hole 46 is provided on the upper end tube wall; an air outlet pipe 39 is also provided at the bottom of the cylindrical collecting box 32, and a pipe mouth cap 40 is threadedly installed at the pipe mouth of the air outlet pipe 39; an exhaust hole 33 is provided at the top of the cylindrical collecting box 32; an embedding hole is provided at the same height of the left and right side frames of the rectangular frame 31; a locking spring is provided in the embedding hole, and a ball 38 is provided at the hole mouth of the embedding hole; the locking spring is used to elastically push the ball 38 to partially protrude out of the embedding hole to limit the side seat 37; when the side seat 37 is located above the ball 38, the disc-shaped piston 35 is close to the bottom of the cylindrical cavity; when the side seat 37 slides to below the ball 38, the cylindrical collecting box 32 moves down so that the disc-shaped piston 35 is close to the top of the cylindrical cavity.

[0028] By utilizing the elastic setting of the two balls 38, the relative position of the cylindrical collecting box 32 in the rectangular frame 31 can be limited. When the bottom of the rectangular frame 31 is impacted, the side seat 37 exceeds the limit of the two balls 38, so that the cylindrical collecting box 32 can continue to fall, and the disc-shaped piston 35 moves up relative to the cylindrical collecting box 32, and the gas at the lower end of the detection tube 41 is sucked into the cylindrical cavity for storage by negative pressure; the setting of the air outlet pipe 39 and the pipe mouth cap 40 can facilitate the discharge of the gas collected in the cylindrical collecting box 32, which is convenient for the collector to perform gas detection; the detection tube 41 is fixed on the rectangular frame 31, and the cylindrical collecting box 32 is installed in a movable manner. Due to the effect of gravity, the cylindrical collecting box 32 will stay at the bottom, which can ensure that the collected gas is not prone to gas leakage after suspension.

[0029] Furthermore, an oblique support rod 42 is obliquely provided between the detection insert tube 41 and the rectangular frame 31. The oblique support rod 42 can enhance the structural strength of the detection insert tube 41.

[0030] Furthermore, the suspension retracting and releasing mechanism includes a driving motor 6, a driving belt 25, an electromagnet 27, a winding roller 8, a driving circular shaft 14 and a rebound compression spring 18;

[0031] A line roller support 7, a pulley support 19 and a side plate 26 are provided on the lower side of the top plate 1; the winding roller 8 is rotatably mounted on the line roller support 7 through the line roller shaft 12, and the winding roller 8 is fixedly mounted on the line roller shaft 12; a pulley shaft 20 is rotatably mounted on the pulley support 19; a driving pulley 21 is fixedly mounted on the pulley shaft 20; a square driving hole and a circular shaft hole are sequentially arranged along the central axis on the line roller shaft 12, and the side length of the square driving hole is greater than the aperture of the circular shaft hole; the driving circular shaft 14 sequentially penetrates the square driving hole and the circular shaft hole on the line roller shaft 12, and can rotate freely in the circular shaft hole; a synchronous square shaft 22 is extended at one end of the driving circular shaft 14, and a square shaft head 15 is arranged at the other end of the driving circular shaft 14; a square synchronous hole is arranged on the pulley shaft 20 along the central axis, and the synchronous square shaft 22 is penetrated and arranged It is installed on the square synchronous hole so that the synchronous square shaft 22 rotates synchronously with the pulley shaft 20; a limit disc 16 is provided on the side of the square shaft head 15, and the diameter of the limit disc 16 is greater than the side length of the square driving hole; a short shaft 23 is rotatably installed on the through end of the synchronous square shaft 22, and a magnetic suction disc 24 is provided on the short shaft 23; the electromagnet 27 is installed on the side plate 26, and an iron disc 28 opposite to the magnetic suction disc 24 is provided at the iron core end of the electromagnet 27; the rebound compression spring 18 is sleeved on the driving circular shaft 14, and the two ends of the rebound compression spring 18 are elastically supported on the limit disc 16 and the wire roller support 7; the driving motor 6 drives the driving pulley 21 to rotate through the driving belt 25; the suspension rope 9 is wound on the winding roller 8; when the iron disc 28 is attracted to the magnetic suction disc 24, the driving circular shaft 14 moves axially to make the square shaft head 15 embedded in the square driving hole.

[0032] By energizing the electromagnet 27, the magnetic disk 24 and the iron disk 28 are attracted to each other, thereby overcoming the elastic force of the rebound compression spring 18, so that the square shaft head 15 is embedded in the square synchronization hole, so that the driving motor 6 can smoothly drive the winding roller 8 to rotate; by utilizing the cooperation between the synchronous square shaft 22 and the square synchronization hole, the transmission of the driving pulley 21 is not affected when the driving circular shaft 14 moves axially; by utilizing the rebound compression spring 18, the square shaft head 15 can be quickly disengaged from the square synchronization hole after the electromagnet 27 is powered off, so that the wire roller shaft 12 can rotate relative to the driving circular shaft 14; by utilizing the rotatable installation of the short shaft 23, when the magnetic disk 24 and the iron disk 28 are attracted to each other, the driving circular shaft 14 can also be driven to rotate normally.

[0033] Furthermore, a protective plate 10 is provided on the wire roller support 7 and below the winding roller 8; a threading hole 11 is provided on the protective plate 10; and the suspension rope 9 passes through the threading hole 11. The threading hole 11 on the protective plate 10 can make the inlet and outlet positions of the suspension rope 9 relatively fixed, thereby avoiding large shaking during the winding and unwinding process.

[0034] Furthermore, a guide slope 17 is provided at the connection between the square shaft head 15 and the driving circular shaft 14 to facilitate the quick insertion of the square shaft head 15 into the square driving hole; and circular baffles 13 are provided at both ends of the winding roller 8 to prevent the suspension rope 9 from being wound into the gap between the winding roller 8 and the wire roller support 7. The guide slope 17 can facilitate the smooth and quick insertion of the square shaft head 15 into the square driving hole; and the circular baffles 13 can prevent the suspension rope 9 from being wound into the gap between the winding roller 8 and the wire roller support 7.

[0035] Furthermore, an infrared position sensor 30 for detecting the rising position of the gas sampling mechanism is provided on the supporting leg 2; an electrical connection socket 29 is provided on the lower side of the top plate 1; the electrical connection wires of the infrared position sensor 30, the electrical connection wires of the drive motor 6, and the electrical connection wires of the electromagnet 27 are electrically connected to the electrical connection socket 29. The electrical connection socket 29 can realize the electrical connection between the collection device and the drone; the infrared position sensor 30 can detect in real time whether the gas sampling mechanism is recovered in place.

[0036] Furthermore, the fuselage binding mechanism includes two side clamping plates 48, two bottom clamping plates 52, a top clamping plate 49, a steel wire rope 57 and a locking bolt 55;

[0037] The lower sides of the two side clamping plates 48 are hingedly mounted on the left and right side edges of the upper side of the top plate 1 through two hinge seats 47; the two bottom clamping plates 52 are hingedly mounted on the opposite inner sides of the two side clamping plates 48; a steel rope fixing seat 50 is provided on the upper side of the top clamping plate 49, and a steel rope through hole is provided on the steel rope fixing seat 50; a steel rope locking hole 54 is extended downwardly on the upper side of the right side clamping plate 48, and the lower hole of the steel rope locking hole 54 passes through the right side of the side clamping plate 48; the locking bolt 55 is screwed The thread is screwed on the right side surface of the side clamping plate 48 on the right side, and the end of the locking bolt 55 extends into the steel rope locking hole 54, and a steel rope clamping plate 56 is rotatably arranged on the extended end; one end of the wire rope 57 is fixed to the bottom clamping plate 52 on the right side, and the other end is successively passed through the rope threading hole 53 in the bottom clamping plate 52 on the left side, the rope threading hole 53 in the side clamping plate 48 on the left side, the steel rope through hole on the steel rope fixing seat 50 and the steel rope locking hole 54 and then extends out; the steel rope clamping plate 56 is pressed on the steel wire rope 57 to achieve fixation.

[0038] Two side clamping plates 48, two bottom clamping plates 52, a top clamping plate 49 and a steel wire rope 57 are used to achieve a wrapped installation of the drone fuselage, so that the collection device can be stably installed on the drone; the locking bolt 55 and the steel rope clamping plate 56 can be used to fix and lock the end of the steel wire rope 57.

[0039] Furthermore, rubber anti-skid pads 51 are provided on the opposite inner sides of the two side clamping plates 48, on the upper sides of the two bottom clamping plates 52, and on the lower side of the top clamping plate 49. The rubber anti-skid pads 51 can achieve stability when the fuselage binding mechanism is installed on the fuselage of the drone.

[0040] Furthermore, a triangular rib plate 5 is provided at the mounting position of the support leg 2 and the lower side of the top plate 1. The triangular rib plate 5 can enhance the structural strength of the mounting position of the support leg 2.

[0041] When the gas safety collection device for installation on a drone is used, the two side clamping plates 48, the two bottom clamping plates 52, the top clamping plate 49 and the steel wire rope 57 are used to wrap the drone body, so that the collection device can be stably installed on the drone; when the drone flies over the grain pile, the controller on the drone controls the drive motor 6 and the electromagnet 27, so that the coil of the electromagnet 27 is powered off, the drive motor 6 stops working, and the drive shaft 14 moves axially under the action of the rebound compression spring 18, and the square shaft head 15 is separated from the square drive hole, so that the gas sampling mechanism It falls freely under the action of gravity; when it reaches the grain pile, the detection tube 41 is inserted into the grain pile, and when the rectangular frame 31 touches the surface of the grain pile, the cylindrical collecting box 32 breaks through the restrictions of the balls 38 on both sides under the impact, and after the cylindrical collecting box 32 continues to move downward, the disc-shaped piston 35 slides relatively to the top of the cylindrical cavity, so that the cylindrical cavity sucks the gas inside the grain pile through the detection tube 41 under the action of negative pressure; after the gas is sucked in and collected, the controller on the drone controls the drive motor 6 and the electromagnet 27, so that the coil of the electromagnet 27 is energized, and the drive shaft 14 moves axially under the action of magnetic adsorption, overcoming the elastic force of the rebound compression spring 18. force, the square shaft head 15 is embedded in the square driving hole, the driving motor 6 starts to work, drives the winding roller 8 to rotate, so that the suspension rope 9 is wound around the winding roller 8, thereby retracting the gas sampling mechanism into the fixed ring 3; the drone then transports the collection device out of the barn, and the collection personnel first seal the lower end of the detection cannula 41 to prevent air from entering from the detection air inlet 44, then open the pipe cap 40, connect it to the outside through the air outlet pipe 39, move the cylindrical collection box 32 upward, so that the disc-shaped piston 35 squeezes out the collected gas inside, so as to facilitate the collection personnel to detect the collected gas; the drone is equipped with a controller for realizing the control of the collection device The controller adopts a control module composed of a single-chip microcomputer, a wireless communication module, a relay and a motor drive circuit. The wireless communication module is used to communicate with the remote control. The relay is used to realize power-on and power-off control of the electromagnet 27. The motor drive circuit is used to realize the start and stop control of the drive motor 6 according to the control command of the single-chip microcomputer. At the same time, the single-chip microcomputer can also receive the position detection signal of the infrared position sensor 30, so as to judge whether the acquisition device has been retracted, so as to facilitate the immediate control of the drive motor 6 to stop. The single-chip microcomputer communicates wirelessly with the remote control through the wireless communication module. The remote control is provided with a release button and a recovery button for sending release and recovery control commands.

[0042] As mentioned above, although the invention has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the invention defined in the appended claims.

Claims

1. A gas safety collection device for installation on a drone, characterized in that: It comprises a top plate (1), four supporting legs (2), a gas sampling mechanism, a suspension and retracting mechanism, and a fuselage binding mechanism; Four supporting legs (2) are vertically mounted at four top corners of the lower side of the top plate (1), and rubber feet (4) are sleeved on the lower ends of the four supporting legs (2); the four supporting legs (2) are fixedly mounted on the same fixed circular ring (3); the gas sampling mechanism is suspended on the suspension retractable mechanism via a suspension rope (9), and the gas sampling mechanism is provided with a detection plug (41) for inserting into the grain; the lower end of the detection plug (41) is closed by a conical tip (43); a detection air inlet hole (44) is provided on the lower end of the detection plug (41); the suspension retractable mechanism is arranged at the center of the lower side of the top plate, and is used to release and recover the gas sampling mechanism; the fuselage binding mechanism is arranged on the upper side of the top plate (1), and is used to install the top plate (1) on the fuselage of the unmanned aerial vehicle; The gas sampling mechanism comprises a rectangular frame (31), a cylindrical collecting box (32) and a disc-shaped piston (35); A lifting ear (34) is provided at the center of the upper side of the top frame of the rectangular frame (31); the lower end of the suspension rope (9) is fixed on the lifting ear (34); a side seat (37) is provided in the middle of the outer side of the left and right side frames of the rectangular frame (31); a rectangular sliding hole is vertically provided on the side seat (37); the left and right side frames of the rectangular frame (31) are respectively inserted in the rectangular sliding holes of the two side seats (37) in a sliding manner; a cylindrical collecting box (32) is vertically provided inside. The cylindrical cavity is provided with a disc-shaped piston (35) horizontally installed in the cylindrical cavity; a sealing ring (36) is provided on the circumferential edge of the disc-shaped piston (35), and the sealing ring (36) is tightly attached to the vertical cavity wall of the cylindrical cavity; a detection insert (41) is vertically fixedly installed on the lower side frame of the rectangular frame (31); the upper end of the detection insert (41) is inserted into the cylindrical cavity from the bottom center of the cylindrical collecting box (32), and a sealing ring is provided at the insertion position of the detection insert (41). The upper end of the detection insert (41) is fixedly mounted at the center of the lower side of the disc-shaped piston (35), and an air inlet hole (46) is provided on the upper end of the tube wall; an air outlet pipe (39) is also provided at the bottom of the cylindrical collecting box (32), and a pipe mouth cap (40) is threadedly installed at the pipe mouth of the air outlet pipe (39); an exhaust hole (33) is provided at the top of the cylindrical collecting box (32); an embedding hole is provided at the same height of the left and right side frames of the rectangular frame (31) A locking spring is provided in the embedding hole, and a ball (38) is provided at the opening of the embedding hole; the locking spring is used to elastically push the ball (38) to partially protrude out of the embedding hole to limit the side seat (37); when the side seat (37) is located above the ball (38), the disc-shaped piston (35) is close to the bottom of the cylindrical cavity; when the side seat (37) slides to below the ball (38), the cylindrical collection box (32) moves downward so that the disc-shaped piston (35) is close to the top of the cylindrical cavity; A triangular rib plate (5) is provided at the mounting position of the lower side of the supporting leg (2) and the top plate (1).

2. The gas safety collection device for installation on a drone according to claim 1, characterized in that: An oblique support rod (42) is obliquely arranged between the detection insertion tube (41) and the rectangular frame (31).

3. The gas safety collection device for installation on a drone according to claim 1, characterized in that: The suspension retracting and releasing mechanism comprises a driving motor (6), a driving belt (25), an electromagnet (27), a winding roller (8), a driving circular shaft (14) and a rebound compression spring (18); A wire roller support (7), a pulley support (19) and a side plate (26) are provided on the lower side of the top plate (1); a wire winding roller (8) is rotatably mounted on the wire roller support (7) via a wire roller rotating shaft (12); a pulley rotating shaft (20) is rotatably mounted on the pulley support (19); a driving pulley (21) is fixedly mounted on the pulley rotating shaft (20); a square driving hole and a circular shaft hole are sequentially provided on the wire roller rotating shaft (12) along the central axis, and the side of the square driving hole is The diameter of the circular shaft hole is longer than that of the circular shaft hole; the driving circular shaft (14) sequentially penetrates the square driving hole and the circular shaft hole on the line roller rotating shaft (12) and can rotate freely in the circular shaft hole; a synchronous square shaft (22) is extended at one end of the driving circular shaft (14), and a square shaft head (15) is arranged at the other end of the driving circular shaft (14); a square synchronous hole is arranged on the pulley rotating shaft (20) along the central axis, and the synchronous square shaft (22) is installed in a through-type manner on the square synchronous hole, so that the synchronous square shaft (2 2) rotate synchronously with the pulley shaft (20); a limiting disc (16) is provided on the side of the square shaft head (15), and the diameter of the limiting disc (16) is greater than the side length of the square driving hole; a short shaft (23) is rotatably mounted on the through end of the synchronous square shaft (22), and a magnetic absorption disc (24) is provided on the short shaft (23); an electromagnet (27) is mounted on the side plate (26), and an iron round bar opposite to the magnetic absorption disc (24) is provided at the iron core end of the electromagnet (27). The invention relates to a magnetic disk (28); a rebound compression spring (18) is sleeved on the driving shaft (14), and the two ends of the rebound compression spring (18) are elastically supported on the limiting disk (16) and the wire roller support (7); the driving motor (6) drives the driving pulley (21) to rotate through the driving belt (25); the suspension rope (9) is wound on the winding roller (8); when the iron disk (28) and the magnetic disk (24) are attracted, the driving shaft (14) moves axially so that the square shaft head (15) is embedded in the square driving hole.

4. The gas safety collection device for installation on a drone according to claim 3 is characterized in that: A protective plate (10) is provided on the wire roller support (7) and below the wire winding roller (8); a threading hole (11) is provided on the protective plate (10); and a suspension rope (9) passes through the threading hole (11).

5. The gas safety collection device for installation on a drone according to claim 3 is characterized in that: A guide slope (17) is provided at the connection between the square shaft head (15) and the driving circular shaft (14) to facilitate the square shaft head (15) to be quickly embedded in the square driving hole; and circular baffles (13) are provided at both ends of the winding roller (8) to prevent the suspension rope (9) from being wound into the gap between the winding roller (8) and the roller support (7).

6. The gas safety collection device for installation on a drone according to claim 3, characterized in that: An infrared position sensor (30) for detecting the rising position of the gas sampling mechanism is provided on the support leg (2); an electrical connection socket (29) is provided on the lower side of the top plate (1); and electrical connection wires of the infrared position sensor (30), the drive motor (6) and the electromagnet (27) are electrically connected to the electrical connection socket (29).

7. The gas safety collection device for installation on a drone according to claim 1, characterized in that: The fuselage binding mechanism comprises two side clamping plates (48), two bottom clamping plates (52), a top clamping plate (49), a steel wire rope (57) and a locking bolt (55); The lower sides of the two side clamping plates (48) are hingedly mounted at the left and right side edges of the upper side of the top plate (1) through two hinge seats (47); the two bottom clamping plates (52) are hingedly mounted on the opposite inner sides of the two side clamping plates (48); a steel rope fixing seat (50) is provided on the upper side of the top clamping plate (49), and a steel rope through hole is provided on the steel rope fixing seat (50); a steel rope locking hole (54) is provided on the upper side of the right side clamping plate (48) and extends downward, and the lower hole of the steel rope locking hole (54) passes through the right side of the side clamping plate (48); the locking bolt (55) is threaded The steel wire rope (57) is screwed on the right side surface of the side clamping plate (48) on the right side, and the end of the locking bolt (55) extends into the steel rope locking hole (54), and a steel rope clamping plate (56) is rotatably arranged on the extended end; one end of the steel wire rope (57) is fixed on the bottom clamping plate (52) on the right side, and the other end is successively inserted into the rope threading hole (53) in the bottom clamping plate (52) on the left side, the rope threading hole (53) in the side clamping plate (48) on the left side, the steel rope through hole on the steel rope fixing seat (50) and the steel rope locking hole (54) and then extends out; the steel rope clamping plate (56) is pressed on the steel wire rope (57) to achieve fixation.

8. The gas safety collection device for installation on a drone according to claim 7, characterized in that: Rubber anti-skid pads (51) are provided on the opposite inner side surfaces of the two side clamping plates (48), on the upper side surfaces of the two bottom clamping plates (52) and on the lower side surface of the top clamping plate (49).

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